SmogRank / World / France / Auvergne-Rhône-Alpes / February 2025
Most polluted cities in Auvergne-Rhône-Alpes, France, February 2025
19 cities in Auvergne-Rhône-Alpes, France ranked by their average PM2.5 over the 28 days. Worst: Passy at 26.0 µg/m³, #267 of 2,574 cities in the world. Cleanest: Aurillac at 6.6. A city needs measurements on 70% of the days to be ranked.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Passy 24%
- 2Romans-sur-Isère 15%
- 3Annemasse 14%
- 4Lyon 14%
- 5Villefranche-sur-Saône 14%
- 6Bourg-en-Bresse 10%
- 7Bellegarde-sur-Valserine 10%
- 8L'Isle-d'Abeau 10%
- 9Valence 10%
- 10Saint-Étienne 5%
- 11Grenoble 5%
- 12Moulins 4%
- 13Crolles 0%
- 14Chambéry 0%
- 15Vichy 0%
- 15Albertville 0%
- 17Montluçon 0%
- 17Clermont-Ferrand 0%
- 19Aurillac 0%
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
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SmogRank, most polluted cities in Auvergne-Rhône-Alpes, France, PM2.5, February 2025, smogrank.com/fr/region/auvergne-rhone-alpes/history/2025-02 (accessed 7 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.